Host-Plant Resistance in Pest Management

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© 2014 Elsevier Inc. All rights reserved.. Plant resistance to a herbivore results from the expression by the plant of resistance-related traits that interfere with one or more aspects of the herbivore's complex interaction with the plant. As an integrated pest management tactic, host-plant resistance entails the intentional use of resistant crop varieties, alone or in combination with other tactics, to reduce the impact of herbivores on crop yield or quality. The traditional approach to the development and use of resistant varieties in integrated pest management involves four steps: screening (evaluation of crop germplasm for resistant genotypes), categorization (assignment of resistance phenomena to the categories of antibiosis, antixenosis, and tolerance), breeding (introduction of genes responsible for resistance into agronomically acceptable backgrounds), and implementation (integration of resistant varieties into management programmes). This essentially empirical approach to host-plant resistance has enjoyed some tremendous successes. However, as sophisticated analytical and molecular genetic tools for the study of the causal bases of resistance become more widely available, it is clear an approach based on understanding the mechanisms of plant resistance will be the most efficient path to development of resistant varieties for crop protection in the future. Induced resistance, or resistance triggered by prior herbivore attack, has a number of potential uses in crop protection that are only now beginning to be explored. The use of plant resistance for managing arthropod pests in rice illustrates many aspects of the use of host-plant resistance in pest management.

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Integrated Pest Management: Current Concepts and Ecological Perspective

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